Pub Date : 2022-12-19DOI: 10.21608/jesaun.2022.147292.1151
محمد عبداليادي نصار
{"title":"The Afflux Calculation Under Effect of Different Number of Vents Experimentally and Using HEC-RAS","authors":"محمد عبداليادي نصار","doi":"10.21608/jesaun.2022.147292.1151","DOIUrl":"https://doi.org/10.21608/jesaun.2022.147292.1151","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124169340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.21608/jesaun.2022.160870.1165
niran abouseif
{"title":"کفاءة الأداء الصوتی بمسجد سنبل الجدید بمدینة أسیوط Efficiency of acoustic performance at the new Sonbol Mosque in Assiut","authors":"niran abouseif","doi":"10.21608/jesaun.2022.160870.1165","DOIUrl":"https://doi.org/10.21608/jesaun.2022.160870.1165","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126078991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-23DOI: 10.21608/jesaun.2022.167818.1172
M. Ahmed, A. Farghaly
{"title":"The combined effect of seismic-induced collision and soil stress irregularity on seismic response of adjacent high-rise buildings: Evaluation and mitigation","authors":"M. Ahmed, A. Farghaly","doi":"10.21608/jesaun.2022.167818.1172","DOIUrl":"https://doi.org/10.21608/jesaun.2022.167818.1172","url":null,"abstract":"","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129261762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-21DOI: 10.21608/jesaun.2022.154553.1159
A. Nady, Doaa K. Hassan, Ayman Assem
Architectural spatial layout configurations are the result of a complex design process aiming at managing the most advantageous location of all spaces with certain objectives and constraints. In the presence of broadening the scope of understanding spatial configuration, its role, and its composition in scope of various programmatic, ideological, formal, and engineering aspects, embedded in a complex theoretical background. The aspect of evaluation was the least apparent and there were significant limitations to what can be achieved there. This paper is aiming at evaluating functionality (such as quality of space, use, Access, adjacency, non-adjacency, proximity etc.), build quality (such as performance, efficiency, cost, etc.), impact (such as user performance, internal quality, urban, social, and cultural integration, etc.), indication of the quality of the architectural space design and the quality of the layout configuration. To achieve this research goal, we devised all possible spatial relation, affecting these qualities, as inputs for a given architectural space using descriptive rule blocks. We defined this fuzzy logic system for residential spaces that has been blended into a layout to evaluate the layout configuration. We defined all input variables, output variables, and fuzzy sets, and present space-space relations using membership functions. The paper proposes a framework based on fuzzy logic approach for automated evaluation of architectural spatial layout configurations.
{"title":"A Proposed Framework for Automated Evaluation of Architectural Spatial Configurations Using Fuzzy Logic Approach","authors":"A. Nady, Doaa K. Hassan, Ayman Assem","doi":"10.21608/jesaun.2022.154553.1159","DOIUrl":"https://doi.org/10.21608/jesaun.2022.154553.1159","url":null,"abstract":"Architectural spatial layout configurations are the result of a complex design process aiming at managing the most advantageous location of all spaces with certain objectives and constraints. In the presence of broadening the scope of understanding spatial configuration, its role, and its composition in scope of various programmatic, ideological, formal, and engineering aspects, embedded in a complex theoretical background. The aspect of evaluation was the least apparent and there were significant limitations to what can be achieved there. This paper is aiming at evaluating functionality (such as quality of space, use, Access, adjacency, non-adjacency, proximity etc.), build quality (such as performance, efficiency, cost, etc.), impact (such as user performance, internal quality, urban, social, and cultural integration, etc.), indication of the quality of the architectural space design and the quality of the layout configuration. To achieve this research goal, we devised all possible spatial relation, affecting these qualities, as inputs for a given architectural space using descriptive rule blocks. We defined this fuzzy logic system for residential spaces that has been blended into a layout to evaluate the layout configuration. We defined all input variables, output variables, and fuzzy sets, and present space-space relations using membership functions. The paper proposes a framework based on fuzzy logic approach for automated evaluation of architectural spatial layout configurations.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122072256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-06DOI: 10.21608/jesaun.2022.135111.1130
Shehab Mohamed, Mostafa A A Mahmoud, A. Towfeek
This research aims to improve the engineering properties of expansive soil by using locally low-cost materials such as crushed glass wastes and lime. The studied expansive soil is considered unsuitable soil for civil engineering projects such as roads and buildings, as it was classified according to the AASHTO classification A-7-6. This soil was treated only with different ratios of crushed glass wastes (0%, 5%, 10%, 15%, and 20% by weight of dry soil), as well as the soil was treated only with different ratios of lime (0%, 2%, 4%, 6%, and 8% by weight of dry soil). Experiments of Atterberg limits, standard Procter, direct shear, free swell, swelling pressure, and both un-soaked and soaked California Bearing Ratio tests were carried out on the untreated and treated soil. The results showed that by increasing added percentage of crushed glass wastes and lime separately, the consistency properties (Atterberg limits), the shear strength parameters (direct shear test), free swell, swelling pressure, and both un-soaked and soaked California Bearing Ratio of the studied expansive soil were improved; except for compaction characteristics, by adding crushed glass wastes the M.D.D was increased and O.M.C was decreased while by adding lime, the M.D.D was decreased and O.M.C was increased. This helps to make use of low-cost local materials, clean the environment of glass wastes, and recycle these wastes so that they can be used on an environmental, economic, and engineering level. This aligns with Egypt's Vision 2030 sustainable development approach in both the environmental and economic dimensions.
{"title":"Treatment of Swelling Soil Using Crushed Glass Wastes and Lime","authors":"Shehab Mohamed, Mostafa A A Mahmoud, A. Towfeek","doi":"10.21608/jesaun.2022.135111.1130","DOIUrl":"https://doi.org/10.21608/jesaun.2022.135111.1130","url":null,"abstract":"This research aims to improve the engineering properties of expansive soil by using locally low-cost materials such as crushed glass wastes and lime. The studied expansive soil is considered unsuitable soil for civil engineering projects such as roads and buildings, as it was classified according to the AASHTO classification A-7-6. This soil was treated only with different ratios of crushed glass wastes (0%, 5%, 10%, 15%, and 20% by weight of dry soil), as well as the soil was treated only with different ratios of lime (0%, 2%, 4%, 6%, and 8% by weight of dry soil). Experiments of Atterberg limits, standard Procter, direct shear, free swell, swelling pressure, and both un-soaked and soaked California Bearing Ratio tests were carried out on the untreated and treated soil. The results showed that by increasing added percentage of crushed glass wastes and lime separately, the consistency properties (Atterberg limits), the shear strength parameters (direct shear test), free swell, swelling pressure, and both un-soaked and soaked California Bearing Ratio of the studied expansive soil were improved; except for compaction characteristics, by adding crushed glass wastes the M.D.D was increased and O.M.C was decreased while by adding lime, the M.D.D was decreased and O.M.C was increased. This helps to make use of low-cost local materials, clean the environment of glass wastes, and recycle these wastes so that they can be used on an environmental, economic, and engineering level. This aligns with Egypt's Vision 2030 sustainable development approach in both the environmental and economic dimensions.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"20 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133425241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-02DOI: 10.21608/jesaun.2022.154690.1160
Ahlam Ali, M. Soliman, Yasser Abdelrhman, Ibrahim Hasab-allah
A new cladding process is proposed and implemented on a bimetallic tube of copper and aluminum. Obtaining a good mechanical bond between the tube’s layers using simple setup components with low required process force and without using heating are the most distinguishing feature of this study. The objective of this paper is to study the effect of using three different spherical tipped punch diameters (21 mm, 21.6 mm, and 22 mm) on the cladding process. A spherical punch with a slightly enlarged spherical tip was pressed into the clad tube. To study the dynamical analysis of the developed process, an FE model was developed using ANSYS workbench®. The bonding of an AL6082T6 Aluminum tube (as the clad tube) to a pure copper tube (as the base tube) was studied. FE analysis results showed that increasing ball tipped punch diameter leads to an increase in the required process force, the deformation magnitude, the equivalent plastic strain, the maximum principal stress, and the maximum principal elastic strain values. The required process force was measured experimentally and by FE simulation for the three different ball tipped punch diameters. The average values of the FE process forces were found to be 21 KN, 39 KN and 48 KN respectively for the mentioned diameters, while experimentally the average forces values were found to be 13.3 KN, 33 KN and 39 KN for the mentioned diameters, respectively. A 10 KN force was required to dismantle the bimetallic tube layers using shear punch test.
{"title":"Investigation of AL/CU Bimetallic Tube Cladding Process by Severe Plastic Deformation","authors":"Ahlam Ali, M. Soliman, Yasser Abdelrhman, Ibrahim Hasab-allah","doi":"10.21608/jesaun.2022.154690.1160","DOIUrl":"https://doi.org/10.21608/jesaun.2022.154690.1160","url":null,"abstract":"A new cladding process is proposed and implemented on a bimetallic tube of copper and aluminum. Obtaining a good mechanical bond between the tube’s layers using simple setup components with low required process force and without using heating are the most distinguishing feature of this study. The objective of this paper is to study the effect of using three different spherical tipped punch diameters (21 mm, 21.6 mm, and 22 mm) on the cladding process. A spherical punch with a slightly enlarged spherical tip was pressed into the clad tube. To study the dynamical analysis of the developed process, an FE model was developed using ANSYS workbench®. The bonding of an AL6082T6 Aluminum tube (as the clad tube) to a pure copper tube (as the base tube) was studied. FE analysis results showed that increasing ball tipped punch diameter leads to an increase in the required process force, the deformation magnitude, the equivalent plastic strain, the maximum principal stress, and the maximum principal elastic strain values. The required process force was measured experimentally and by FE simulation for the three different ball tipped punch diameters. The average values of the FE process forces were found to be 21 KN, 39 KN and 48 KN respectively for the mentioned diameters, while experimentally the average forces values were found to be 13.3 KN, 33 KN and 39 KN for the mentioned diameters, respectively. A 10 KN force was required to dismantle the bimetallic tube layers using shear punch test.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127277483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-01DOI: 10.21608/jesaun.2022.149280.1153
M. Mohamed, Abdel-Rahman Ahmed, M. Ahmed, O. Farghal
Steel corrosion is thought to be one of the primary causes of the inadequate durability of concrete buildings in the maritime environment. Because of this, adopting Fiber-Reinforced Polymer (FRP) bars in harsh settings has attracted a lot of attention for its appealing mechanical properties as well as to prevent corrosion issues. But because there hasn't been much research in this area, we don't fully understand how fiber-reinforced polymer (FRP) bars behave when they are compressed. This work's goal is to assess the expected axial compressive strength of columns when hybrid reinforcement is used in place of steel reinforcement. Hybrid bars are steel bars surrounded by a cover shell of Glass or Carbon FRP (hybrid-steel) for longitudinal reinforcement and/or transverse reinforcement. 17 column specimens were included in an experimental study program that was created. The specimens were tested to failure with an axial loading condition. The parameters studied were the type of fibers, the percentage of steel in the hybrid reinforcement for longitudinal main reinforcement ρ L (0.96, 0.44, and 0.25), the ratio of the web reinforcement (internal ties), the proportion of fiber in the hybrid bars, as well as the columns' cross sections' rectangularity. Based on the data, mathematical models were devised and assessed to forecast the load bearing capability of the column. The findings indicate that hybrid reinforced concrete columns have acceptable levels of dependability index in general
{"title":"Prediction of Axial Compressive Strength of Hybrid Reinforced Concrete Columns under Static Loading","authors":"M. Mohamed, Abdel-Rahman Ahmed, M. Ahmed, O. Farghal","doi":"10.21608/jesaun.2022.149280.1153","DOIUrl":"https://doi.org/10.21608/jesaun.2022.149280.1153","url":null,"abstract":"Steel corrosion is thought to be one of the primary causes of the inadequate durability of concrete buildings in the maritime environment. Because of this, adopting Fiber-Reinforced Polymer (FRP) bars in harsh settings has attracted a lot of attention for its appealing mechanical properties as well as to prevent corrosion issues. But because there hasn't been much research in this area, we don't fully understand how fiber-reinforced polymer (FRP) bars behave when they are compressed. This work's goal is to assess the expected axial compressive strength of columns when hybrid reinforcement is used in place of steel reinforcement. Hybrid bars are steel bars surrounded by a cover shell of Glass or Carbon FRP (hybrid-steel) for longitudinal reinforcement and/or transverse reinforcement. 17 column specimens were included in an experimental study program that was created. The specimens were tested to failure with an axial loading condition. The parameters studied were the type of fibers, the percentage of steel in the hybrid reinforcement for longitudinal main reinforcement ρ L (0.96, 0.44, and 0.25), the ratio of the web reinforcement (internal ties), the proportion of fiber in the hybrid bars, as well as the columns' cross sections' rectangularity. Based on the data, mathematical models were devised and assessed to forecast the load bearing capability of the column. The findings indicate that hybrid reinforced concrete columns have acceptable levels of dependability index in general","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128601124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-27DOI: 10.21608/jesaun.2022.151656.1156
Yasser Elhakem, Dina. A. Emarah
Many old barrages along the Nile River face different problems, such as increased discharge or/and differences in head, scour, and material aging. Therefore, the irrigation networks need to be enhanced by upgrading the main controlling water structure, especially on the Nile River. As a result of examining the structural integrity of the main Nile River barrages, the decision was made to replace many of the Nile river's defected barrages, with the exception of Zefta barrage, which was rehabilitated. The decision to rehabilitate Zefta barrage was chosen according to the structural status, affected area, and expected life after repair. Moreover, the decision was taken after comparing the cost of replacement and rehabilitation of the barrage. Heavy massive shear deformation stiffened structures are rarely tested by implementing such techniques contrary to elastic structures such as bridges. This study aims mainly to evaluate the structural status of Zefta barrage before and after recent rehabilitation using dynamic tests. This paper presents the collected structural data and test results of the Zefta barrage. The results indicate that the recent rehabilitation of the Zefta barrage significantly influences structural behaviour and barrage safety.
{"title":"Using Dynamic Tests to Evaluate Structural Status of Barrage Before and After Rehabilitation","authors":"Yasser Elhakem, Dina. A. Emarah","doi":"10.21608/jesaun.2022.151656.1156","DOIUrl":"https://doi.org/10.21608/jesaun.2022.151656.1156","url":null,"abstract":"Many old barrages along the Nile River face different problems, such as increased discharge or/and differences in head, scour, and material aging. Therefore, the irrigation networks need to be enhanced by upgrading the main controlling water structure, especially on the Nile River. As a result of examining the structural integrity of the main Nile River barrages, the decision was made to replace many of the Nile river's defected barrages, with the exception of Zefta barrage, which was rehabilitated. The decision to rehabilitate Zefta barrage was chosen according to the structural status, affected area, and expected life after repair. Moreover, the decision was taken after comparing the cost of replacement and rehabilitation of the barrage. Heavy massive shear deformation stiffened structures are rarely tested by implementing such techniques contrary to elastic structures such as bridges. This study aims mainly to evaluate the structural status of Zefta barrage before and after recent rehabilitation using dynamic tests. This paper presents the collected structural data and test results of the Zefta barrage. The results indicate that the recent rehabilitation of the Zefta barrage significantly influences structural behaviour and barrage safety.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115634822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-01DOI: 10.21608/jesaun.2022.156237.1162
Yasmin Talaat, Reham Osman
A billboard can be defined as a large outdoor advertising structure, usually found in high-traffic areas, offering advertising to drivers and pedestrians as well and contributes to provide any information on the availability of products or services as well as displaying government and commercial advertisements. But as a matter of fact, Appropriate attention is not being paid by the relevant authorities in Egypt in applying billboards to reduce the consequences on the urban quality of life. Therefore, this paper has concentrated on evaluating the impact of prevalence billboards on urban quality of life at the local level. The data in the study were obtained by personal observation, face to face interviews and online questionnaire to investigate the impact of Installing Billboards on the urban quality of life along selected street in New Cairo City. It has been observed as the display of billboards in the urban environment has implications and involvement on urban quality of life having adverse effects on numerous aspects. Based upon the findings of the research, that installation of billboards had been recommended to be treated as a part of the urban quality of life indicators especially that the urban quality of life has become one of the major socio-economic and political topics. In addition, the study recommends suitable legislation for defining size restrictions and standards of size, color, position of these billboards
{"title":"Prevalence of Billboards and its influence on urban quality of life- Based on Billboards installed on 90th North St, New Cairo","authors":"Yasmin Talaat, Reham Osman","doi":"10.21608/jesaun.2022.156237.1162","DOIUrl":"https://doi.org/10.21608/jesaun.2022.156237.1162","url":null,"abstract":"A billboard can be defined as a large outdoor advertising structure, usually found in high-traffic areas, offering advertising to drivers and pedestrians as well and contributes to provide any information on the availability of products or services as well as displaying government and commercial advertisements. But as a matter of fact, Appropriate attention is not being paid by the relevant authorities in Egypt in applying billboards to reduce the consequences on the urban quality of life. Therefore, this paper has concentrated on evaluating the impact of prevalence billboards on urban quality of life at the local level. The data in the study were obtained by personal observation, face to face interviews and online questionnaire to investigate the impact of Installing Billboards on the urban quality of life along selected street in New Cairo City. It has been observed as the display of billboards in the urban environment has implications and involvement on urban quality of life having adverse effects on numerous aspects. Based upon the findings of the research, that installation of billboards had been recommended to be treated as a part of the urban quality of life indicators especially that the urban quality of life has become one of the major socio-economic and political topics. In addition, the study recommends suitable legislation for defining size restrictions and standards of size, color, position of these billboards","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131713387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-13DOI: 10.21608/jesaun.2022.150787.1155
A. Abdelhameed, Saleh Ahmed, Othman Othman, A. M. Ibrahim
The heat transfer area of the heater tubes is a significant factor that deeply affects output power and thermal efficiency in Stirling engines. Alpha-type Stirling engine is concerned in this study. Circular section, elliptical section, twisted elliptical section tubes having twist ratios of 2, 3 and 4 are used as heater designs. 3D simulation model using SST K-ω turbulent model is used for simulating airflow through the hot cylinder, heater tubes, regenerator, cooler, and cold cylinder of the Stirling engine, during a complete engine cycle. The results showed that the elliptical section tubes are better than the circular section tubes. The maximum input energy rate, output work and thermal efficiency are achieved by using elliptical section with twist ratio of 2. These values are 4245.87 W, 1225.34 W and 29.55%, respectively with percentage increments of 5.2%, 7.47% and 3.76%, respectively relative to the circular section heater tubes.
{"title":"INFLUENCE OF USING STRAIGHT AND TWISTED ELLIPTICAL SECTION HEATER TUBES ON STIRLING ENGINE PERFORMANCE","authors":"A. Abdelhameed, Saleh Ahmed, Othman Othman, A. M. Ibrahim","doi":"10.21608/jesaun.2022.150787.1155","DOIUrl":"https://doi.org/10.21608/jesaun.2022.150787.1155","url":null,"abstract":"The heat transfer area of the heater tubes is a significant factor that deeply affects output power and thermal efficiency in Stirling engines. Alpha-type Stirling engine is concerned in this study. Circular section, elliptical section, twisted elliptical section tubes having twist ratios of 2, 3 and 4 are used as heater designs. 3D simulation model using SST K-ω turbulent model is used for simulating airflow through the hot cylinder, heater tubes, regenerator, cooler, and cold cylinder of the Stirling engine, during a complete engine cycle. The results showed that the elliptical section tubes are better than the circular section tubes. The maximum input energy rate, output work and thermal efficiency are achieved by using elliptical section with twist ratio of 2. These values are 4245.87 W, 1225.34 W and 29.55%, respectively with percentage increments of 5.2%, 7.47% and 3.76%, respectively relative to the circular section heater tubes.","PeriodicalId":166670,"journal":{"name":"JES. Journal of Engineering Sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124676883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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